cheshier



(No Model.)

G. T.CHE.SHIER.

No. 247,614. `1%1161111111 sept-.127, 11881.

UNITED STATES PATENT OFFICE.

CASWELL T. OHESHIER, OF TRENTON, MISSOURI, ASSIGNOR OF ONE-HALF TOALBERT L. OHESHIER, .OF SAME PLAGE.

' FURNAoE-DooR.

SPECIFICATION forming part of Letters Patent No. 247,614, datedSeptember 27, 1881.

Y Application led May 23, 1881. (No model.)

To all whom fit may concern Be it known that I, CAswELL T. CHEsHrER,ofTrenton, in the county of Grundyand State of Missouri, have inventedcertain new and useful Improvements in Furnace-Doors forLocomotive-Engines; and I do hereby declare that the following,r is afull, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, which form apart of this specification, in which- Figure l is a perspective view ofso much of the interior of the cab of a locomotive as is necessary toillustrate my invention. Fig. 2 is a bottom plan of the floor of thecab-t'. e., a plan of the under side of the door; and Fig. 3 is a detailView of the treadle and its curved connecting-rod or pitman detached.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention has relation to means for opening and closing thefurnace-doors of locomotive-engines; and it consists in thecombination,wth the door, of a mechanism which is 1ocated underneath theiloor of the cab and operated by a treadle in the door, substantially asand for the purpose hereinafter more fully described.

In firing a locomotive-engine it is of importance to keep thefurnace-door closed as much as possible, in order to keep the draft fromentering the rebox through the door; and it is the object of myinventionto enable the fire-- man to open and shut the door by operatinga treadleplaced in the door of the cab with his foot, so that he need not let goof the shovelful of coal he is about to shovel into the furnace whileopening the door, while at the same time the door will shut of itselfthe moment the engine is fired and he lets go of the treadle with hisfoot.

In the annexed drawings, A represents the iioor, and B the front side ofthe cab, facing with one another, and two of which project into the cab,while the lowermost box is underneath its door.

The outer end of the latch-bar a projects, when the door is closed, intothe spring-latch,

composed of a rigid lower lip, d, and an upper the floor, has a shortarm,f, at right angles,in

the outer end of which is pivoted another arm, E, which connects it withthe short arm of a lever, F, having its fulcrum in the bearingplate G,bolted to the under side of the cabioor. The other end ot' lever F isconnected on one side to the jointed arm Gr of the curved pitman G, andon the other side by a hooked stirrup, h, to a coiled spring, H, theother end of which is connected by the hook or eye t' to the outer orfree end of a stii' spring, I.

The upper end ofthe curved and jointed pitman G G projects up through aslot, g, in the floor of the cab, in which works the treadle K, to the.lower short arm of which it is hinged, as shownmore clearly in Fig. 3of the drawlngs.

From the foregoing description, takenin connection with the drawings,the operation of my invention will readily be understood. The fireman,holding the shovelful of coal in both hands, places his foot on thetreadle, which swings the door open, and after discharging theshovelinto the furnace the door is immediately closed by the operationof the compound springs I and H and the lever mechanism connecting themwith the treadle K and pintle D, and held closed until again purposelyopened by the spring-latch d e. In this manner no time is lost inopening and closing the door, which remains open at each firing onlylong enough to enable the fireman to discharge his shovelful of coalinto the furnace, thus saving fuel, as well as time and labor. All theparts, with the exception of the trendle, are located below the floor ofthe cab, where they are out of the Way, and do not in the least encroachupon or interfere with the working of the engine.

Though intended chiefly for locomotives, it is obvious that my inventionis applicable also to the furnace-doors of steamboat-boilers and boilersof marine and stationary engines, in which cases some modification inthe arrangement of the operating parts may sometimes be found desirable,Without7 however'7 devinting from the spirit of my invention.

I claim and desire to secure byIietters Pntent of the United States-CASW'ELL T. CHESHIER.

Witnesses:

LORENZO RACE, AUGUSTUS J. PARTCH.

